Create an original vertical stack of purple, hot-pink, red, and white coupon labels. Text: “40 优惠券”, “30 立即使用”, “168 满500可用”, “30 优惠券”, “全场特惠 15”. Use saturated gradients, generous clean space, and only two small balanced star highlights; no ribbons, confetti, or burst marks. Transparent background. No logo, watermark, QR code, website, or note text.